Inventor
DEVRIENT LUDWIG
DE6 patents
⚠️ This page may combine multiple inventors who share the name “DEVRIENT LUDWIG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
GAO GES AUTOMATION ORG
5 patentsUS4544181AOct 1, 1985
Identification card
GAO GES AUTOMATION ORG103 citations95
US4496961AJan 29, 1985
Check paper that is protected against forgery and tampering
GAO GES AUTOMATION ORG46 citations94
US4672891AJun 16, 1987
Method of producing an identification card
GAO GES AUTOMATION ORG38 citations92
US4504083AMar 12, 1985
Guilloche identification card
GAO GES AUTOMATION ORG25 citations81
US4629630ADec 16, 1986
Check paper that is protected against forgery and tampering
GAO GES AUTOMATION ORG20 citations80